diff --git a/GdbExecutor.cpp b/GdbExecutor.cpp
index 29e35fb..09192eb 100644
--- a/GdbExecutor.cpp
+++ b/GdbExecutor.cpp
@@ -4072,6 +4072,8 @@ GdbExecutor::ExecuteSelect( const string& sCmd2, const STRVECTOR& vsParams)
             nFilter = CRV_COMPO ; 
          else if ( sFilter == "STM"  ||  sFilter == "SURFTRIMESH")
             nFilter = SRF_TRIMESH ; 
+         else if ( sFilter == "ZMAP")
+            nFilter = VOL_ZMAP ; 
          else if ( sFilter == "TEXT")
             nFilter = EXT_TEXT ; 
       }